Update README.md

Author: ComplexRobot

README.md

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 [psandwich.io](https://psandwich.io)
 
 ![](/sandwich/screenshots/example.png)
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+### Development Info.
+This is an input validator and data display GUI written in HTML, Javascript and CSS and hosted on github.
+
+The data was generated externally with a brute force algorithm written in C++ and compiled with Visual Studio.
+
+All possible 75602251018 ingredient combinations were filtered into the shortest combination (least fillings) for a particular power result using the rules explained [here](https://pastebin.com/p9XhUB0A).
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+Then, a secondary program sorts and filters the results which are saved as data to JSON files with a specific filename format.
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+The C++ source code is not publicly available.